I had a hard time locating a free one online. However, a year or so ago that is where I got mine. Contact this company and they may be able to provide one or point you in the right direction. I order lots of parts for my vintage sewing machines from them. They are very helpful.
https://shop.sew-classic.com/contactus.sc
There are a few listed on eBay if you want the original.
http://www.ebay.com/sch/sis.html?_kw...tion+BOOK+ONLY
Hope this helps!